Plus, are you sure you want to be in a cycle of "-in" sounding names? 2 in a row is fine, but once you hit 3 it would seem out of place to name another child something with a different ending. (Not that I'm a big fan of the significance placed on sib-sets here, but the "-in" sound at the end is a pretty obvious tie.)

My opinion is go with what you like best!! I see the obsession over sibsets matching a lot on this forum and I just don't get it! Style changes, taste change...so this can happen when naming kids. The kids will each own their names and most people they are introduced to won't associate them with their other family members names (like once they go to college, social events, etc).